US 12,331,185 B2
Thermoplastic resin composition and molded article including the same
Wangrae Joe, Daejeon (KR); Daeun Sung, Daejeon (KR); Tae Hoon Kim, Daejeon (KR); Chun Ho Park, Daejeon (KR); Yong Hee An, Daejeon (KR); and Jeongmin Jang, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/760,994
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed May 26, 2021, PCT No. PCT/KR2021/006523
§ 371(c)(1), (2) Date Mar. 16, 2022,
PCT Pub. No. WO2022/065625, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 10-2020-0122542 (KR), filed on Sep. 22, 2020; and application No. 10-2021-0064033 (KR), filed on May 18, 2021.
Prior Publication US 2022/0363888 A1, Nov. 17, 2022
Int. Cl. C08L 51/00 (2006.01); B29C 48/00 (2019.01); B29C 48/395 (2019.01); C08L 25/12 (2006.01); C08L 77/06 (2006.01)
CPC C08L 51/003 (2013.01) [B29C 48/022 (2019.02); B29C 48/397 (2019.02); C08L 25/12 (2013.01); C08L 77/06 (2013.01); B29C 2948/92704 (2019.02); C08L 2201/08 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2205/18 (2013.01)] 16 Claims
 
1. A thermoplastic resin composition, comprising:
from 10 to 70% by weight of a graft copolymer (A) comprising:
(A-1) an aromatic vinyl compound-vinyl cyanide compound graft copolymer-containing acrylate rubber having an average particle diameter of from 50 to 150 nm; and
(A-2) an aromatic vinyl compound-vinyl cyanide compound graft copolymer-containing acrylate rubber having an average particle diameter of from 300 to 600 nm; and
from 30 to 90% by weight of a non-grafted copolymer (B) comprising:
a high molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-1) having a weight average molecular weight of from 160,000 to 200,000 g/mol; and
a low molecular weight aromatic vinyl compound-vinyl cyanide compound copolymer (B-2) having a weight average molecular weight of 80,000 g/mol or more and less than 160,000 g/mol,
wherein the thermoplastic resin composition does not comprise a thermoplastic resin having a glass transition temperature of 125° C. or higher, and
wherein, when extrusion RPMis changed from 20 to 60 under conditions of a barrel temperature of 190° C. and a die temperature of 200° C., a pressure gradient of the thermoplastic resin composition applied to a single screw extruder for sheet molding is 130 or less.